Provided by: libsdl3-doc_3.2.28+ds-1_all 

NAME
SDL_WINDOWPOS_ISCENTERED - A macro to test if the window position is marked as "centered."
SYNOPSIS
#include <SDL3/SDL_video.h>
#define SDL_WINDOWPOS_ISCENTERED(X) \
(((X)&0xFFFF0000) == SDL_WINDOWPOS_CENTERED_MASK)
MACRO PARAMETERS
X the window position value.
AVAILABILITY
This macro is available since SDL 3.2.0.
Simple Directmedia Layer SDL 3.2.28 SDL_WINDOWPOS_ISCENTERED(3)